Boost converter-based anti-input voltage and anti-load fluctuation control system

Abstract

The invention relates to a boost converter-based anti-input voltage and anti-load fluctuation control system, including an input voltage feedforward system, a boost converter control system and a verification system, wherein the input voltage feedforward system is used for adding feedback to the boost converter control system before input voltage, and the verification system performs collection and verification on control system parameters after feedback is added, and adjusts a power switch duty ratio D in the boost converter and a transfer function of a compensation network according to a verification result. The boost converter-based anti-input voltage and anti-load fluctuation control system adopts a strategy of adding feedforward control at the input end, introduces variation oppositeto input disturbance to counteract input side change, and by adoption of a novel derivation mode, an established model is very simple and is easy to realize.

Description

technical field [0001] The invention relates to the technical field of circuit control, in particular to a control system based on a boost converter to resist input voltage and load fluctuations. Background technique [0002] In recent years, scientific research workers have conducted in-depth analysis on the control strategy of boost converters. Some literatures point out that the input voltage feed-forward method can effectively suppress the disturbance of the input voltage, but if the closed feedback is not added, the disturbance of the output load will be can not be suppressed, due to the particularity of the non-minimum phase system of the boost converter itself, the control is very complicated. Some researchers propose that by taking measures to control the boost converter from a non-minimum phase system to a minimum phase system, However, the measures taken are more complicated and difficult to implement. Some people also propose the method of voltage control. This me...

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Problems solved by technology

[0002] In recent years, scientific research workers have conducted in-depth analysis on the control strategy of boost converters. Some literatures point out that the input voltage feedforward method can effectively suppress the disturbance of the input voltage, but if the closed feedback is not added, the disturbance of the output load will be can not be suppressed, due to the particularity of the non-minimum phase system of the boost converter itself, the control is very complicated. Some researchers propose that by taking measures to control the boost converter from a non-minimum phase system to a minimum phase system, However, the measures taken are more complicated and difficult to implement. Some people also propose the method of voltage control. This method has a suppression effect on all disturbances, and has a good effect under general slight disturbances, but the interference suppression ability to the input voltage is not enough. It is not suitable for high-demand occasions

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